CURRENT PROPAGATION CONDITIONS.:
Solar-terrestrial indices for 17 August follow.
Solar flux 67 and estimated planetary A-index 13.
The estimated planetary K-index at 1500 UTC on 18 August was 3.
No space weather storms were observed for the past 24 hours.
No space weather storms are predicted for the next 24 hours.
WHISKY ( WHITE )
ALERT CONDITION: WHISKY ( WHITE )
Saturday, August 18, 2018 - 17:21 GMT - UPDATE # 35
OPERATIONAL FORECAST. - GEOMAGNETIC FIELD.
The geomagnetic field is expected to be quiet and unsettled for the
remainder of 18 Aug and generally quiet conditions are expected on 19
Aug as CH HSS influence wanes and subsides. Unsettled and active
conditions are expected on 20 Aug due to the influence of a negative
polarity CH HSS.
.- SOLAR ACTIVITY.
Solar activity is expected to be very low on 18-20 Aug.
LIGHTNING - (QRN) HF OPERATIONAL
BRIEFING - CURRENT CONDITIONS IN DETAIL CURRENT SOLAR
CONDITIONS VISIBLE DISK
G/S/R SCALES USED DEF'S USED LIGHTNING - (QRN)
HF OPERATIONAL BRIEFING - CURRENT CONDITIONS IN DETAIL
CURRENT SOLAR CONDITIONS
Solar activity was very low. Region 2718 (S07E04, Hrx/alpha) remained unchanged from the previous period. No Earth-directed CMEs were observed in available coronagraph imagery.
RADIO BLACKOUTS - SOLAR STORMS - GEOMAGNETIC STORMS
The geomagnetic field reached active levels due to the waning influence of a positive polarity CH HSS.
"D" LAYER - HF ATTENUATION LEVELS
AURORA - NORTH POLE - SHORT PATH